Move Apple Photos Library to NAS?

I have a 1.23TB Apple Photos Library on my MacBook Pro that I need to move to my NAS or an external drive. I began transferring the .photoslibrary file and it got hung up after just a couple GB. I read somewhere that it may be due to the NAS not being formatted as MacOS Extended Journaled.

What is the best way to offload these files that are "trapped" inside the Apple Photos Library file? Should I transfer the entire library somewhere or I do I need to export everything out of it? I don't care for Apple Photos and just need the files backed up somewhere so I'm not concerned about keeping them in the Library.